Explosion-engine.



PATENTED FEB. 4, 1908.

C. L. EDWARDS.

EXPLOSION ENGINE.

APPLICATION IILIED mu. 8. 1907.

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EXPLOSION ENGINE.

APPLICATION FILED MAE. a. 1907.

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EXPLOSION-ENGINE.

Specification of Letters Patent.

' Application filed March 8.1907. Serial No. 361.214..

Patentel Feb. 4,1908.

To all whom it may concern:

Be it known that 1, CHARLES LEET En- .WARDS, a citizen of the United States, and

resident of Vernon, in the county of Oneida and State of New York, have invented an Improved Explosion-Engine, of which the following is a specification.

. My invention is an improvement in explosion engines, and consists in certain novel constructions and combinations of parts hereinafter described and claimed.

Referring to the drawings forming a part hereof, Figure 1 is a vertical section through my improved engine. Fig. 2 is an enlarged detail of the upper end of Fig. 1, showing the valves in one osition. Fig. 3 is a similar view showing t e valves in another position. Fig.4 is a similar view showing the valves in another position. Fig. 5 is a view of one form of cam for operating the valves. Fig 6 is a view of another form of cam. is a lan view of the inlet valve, and Fig. 8 is a etail view of a part of .the'pull rod used with the cam of Fig. 6.

In thepresent embodiment of my invention, thecylinder 1 is jacketed as at 2, and the piston 3 is connected by the piston rod 4 with the crank arm of the drive shaft 5. The

drive shaft is provided with fiy wheels 6 and with the toothed portion 7 meshing with the pinion 8 secured to a cam shaft 9 journaled 1n the casing of the engine, and provided on its outer end with a cam 10 for a purpose to be hereafter described. H i

The cylinder is provided with an opening at one end, and formed in the opening is an inner conical valve seat 11, and an outer cylindrical valve seat 12.

of the cylinder, and an ex municates with the opening on the opposite side of the cylinder. At'the end ofthe cylinder is a valve stem guide 15, provided at its seat, and the'said valve is provided with a.

, plurality of openings 18 therethrough, and

with a peripheral flange 19, of a depth sufiicient to close the exhaust port when" the said inlet valve is depressed, as shown in Fig. 4. The openings 18 through the inlet valve are closed by the petticoat 16 when the inlet valve is 1n its normal position, and the stem 20 of said valve extends outwardl through the stem guide 15 and is prov ed on its Fig. 7

An inlet port 13' communicates with the opening on, one side aust port 14 com-' outer end with a collar 21 for a purpose to be hereafter described.

The exhaust valve 22 engages the-conical seat 11, and the stem thereof extends through the stem 20 of the inlet valve, and is provided on its outer end with a collar 22 of greater diameter than the collar 21, and spaced apart therefrom.

A spiral spring 23 is arranged between the collar 21 and the end of the cylinder, and a second spring 24 is arranged between the .collar 22 and the end of the cylinder, the

second spring beingconcentric with the first spring, and of greater strength for a purpose to be hereafter described. A lever 25 1s pivoted to the engine frame near the end of the cylinder, one end of said lever enga ing the collar 22 on the end of the exhaust Va ve, and the other end of the lever is engaged by a push rod 26 mounted to slide on the frame and engaged at its opposite end by the cam 1O before mentioned.

If it is desired to make use of a pull rod for opening the valve, instead of a push rod, the cam shown in Fig. 6, is made use of, and instead of usin a pivoted lever as shown in the above described construction, a slidable rod 27 is made use of, the said rod having an angular portion 28 adapted to engage the collar of the valve stem, and" the pull'rod is normally maintained in contact with the cam by means of a-spring 29', the operation of the remaining parts being the same in both cases.

In operation, when the exhaust valve is first opened, the products of combustion are permitted to escape through the exhaust outletto the outside ai-r,'the push rod being engaged at this time by the portion 31 of the cam 10. As soon as the plston commences its forward stroke, the push rod is engaged by the portion 32 of the cam, thus continuin the opening motion of the exhaust valve, unti the collar 22 'thereon engages the'collar 21 of the inlet valve, after which the inlet valve partakes of the motion of the exhaust valve, and is moved inward to cover the exhaust port, and to move the inlet valve away from the petticoat whereby to uncover the openings through said valve, thus permitting the charge to be drawn into the cylinder by the piston.

the exhaust valve begins to open when the pull rod is en aged by the part 33 of the said cam, and hot valves are opened by the engagement of the pull rod with the portion 34 of the cam. The latter form of cam and pull rod is preferable in cylinders provided.

with an. auxiliaryexhaust, while the former construction is preferred in cylinders not so provided.

It will be observed that the incoming cool charge passes over the heated exhaust valve, thus-cooling the same and further vaporizing the said charge. The inrus'hing charge also acts to clean the exhaust valve and to prevent scaling. B providing a spring of greater strength for the exhaust valve, the said valve will move quickly against the inlet valve at the return motion thereof, thusclosing the inlet. Bosses 40 are arranged on the lower face of the inlet valve for retaining said inlet valve at all times slightly out of contact with the exhaust valveexhaust valve. normally resting on the.

Iclaim:

1. In an explosion engine, the combi nation with a cylinder provided with a water jacket, and having in the end thereof an opening in which are formed an inner conical and an outer cylindrical valve 'seat, and having an inlet port and an exhaust port communicating with the opening, of an i with a petticoat, an inlet valve, having a plurality of openings therethrough, normally closed by the petticoat, said valve moving in the cylindrical seat, and having a stem encircling the exhaust valve stem, said valve having a peripheral flange .ada ted to close the exhaust port, when move away from the petticoat, concentric s rings restlng at 'their inner ends against t 0 cylinder, and

encircling the valve'stems, the outer spring 1 being of greater strength than the inner spring, a collar on each of the stems for engaging the outer ends of said springs, the

' collar on the exhaust valve stem being of greater diameter and engaging the stronger spring, said collars being spaced apart whereby the continued movement of the exhaust valve stem after the 0 enin of the exhaust port will move;the' in ct valve to close the.

exhaust port and to open the inlet port, a drive shaft, a piston in the cylinder and connected therewith, and a connection between the drive shaft and the valve stem for operating the same at regular intervals.

2. In an explosion engine, the combination with a cylinder having an end opening in which are formed an inner conical and an outer cylindrical valve seat, and having inlet and exhaust pipes communicating with the opening, of an exhaust valve normally resting on the conical seat and closing the opening, said cylinder .being provided with a valve stem guide having at its inner end a petticoat, an inlet valve having a lurality of openings therethrough normally (ilosed by the petticoat, the said valve moving in the cylindricalseat, and having a peripheral flange adapted to close the exhaust port when moved away from the petticoat, springs acting to seat said valves, a drive shaft, a piston in the cylinder connectedwith the drive shaft, means whereby the drive shaft may open said exhaust valve at predetermined intervals, and means whereby the exhaust valve may open the inlet valve when said exhaust valve is fully opened. I

3. In an ex losion engine, the combination with a cy inder having an end opening in which are formed an inner conical and an outer cylindrical valve seat, and having inlet "ing, ,said'cylinder being provided with a valve stem guide having at its inner end a petticoat, an inlet valve having a plurality of openings therethrough normally closed by the petticoat, the sald valve moving in the cylindrlcal seat, and having a peripheral flange adapted to' close the exhaust port when moved away from the petticoat,

springs acting to seat said valves, means for opening the exhaust valve at predetermined intervals and for opening the inlet valve at the end of the opening movement of the exhaust valve.

CHARLES LEET EDWARDS. Witnesses:

E. GQODELL THOMAS. EDWARD C. OLOOTT. 

